International Symposium on Antennas and Propagation
Design of an UHF RFID tag antenna utilizing a size-reduction technique in roll to roll (R2R) process
Youngbaek Choi, Uisheon Kim, Gyubong Jung, Jaehoon Choi,
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With the recent growth of radio frequency identification (RFID) systems, the research on the design of tag antennas has mainly focused on how to achieve ultra-low-cost mass production as well as size-reduction with high efficiency . Since hybrid solutions with silicon identity generating chips and printed antennas are commercially available, the roll to roll (R2R) process has become one of the great interesting solutions for fast-fabrication and low-cost mass manufacturing . However, tag antennas designed with silver ink as conductor in R2R process yield reduced reading range compared to that made of copper since the conductivity of silver ink is lower than the conductivity of copper. Thus, it is great concern in R2R production to achieve high efficiency enough for practical applications. In this paper, an UHF band RFID tag antenna utilizing a size-reduction technique is proposed. The efficiency of the proposed tag antennas printed by silver ink on polyester substrate in R2R process is compared to that of the same designed tag antenna made of copper on FR-4 substrate.